Gr 8 Up-Tom Raines faces his biggest challenges yet in this final installment of the trilogy that began with Insignia (HarperCollins, 2012). The action begins immediately as Tom accidentally creates a security incident that exposes the existence of his neural computer to his already paranoid father and puts them both in danger with the NSA. He manages to free his father, but alienates him in the process. Reporting back for training at the Spire, he finds that much has changed: a new General is in charge, and training (and punishment) is in place to force them to be better soldiers. Tom continues to use his secret ability of infiltrating networks to communicate with his love interest, Medusa. The truly evil Joseph Vengerov is a threat to everyone, and when he kidnaps Tom to examine and ultimately use his secret ability, he may be hard to stop. There are finally explanations to be had for some major questions, and what they lack in credibility is compensated for by the nonstop action and intrigue that fills every page, much like the first two installments. Some readers may find the juvenile humor funny, but others will find it jarring alongside the very adult decisions that Tom and his friends must make. Still, a worthwhile read for those who enjoyed the previous books. Kelly Jo Lasher, Middle Township High School, Cape May Court House, NJ

In this satisfying trilogy-conclusion (Insignia; Vortex), cadet Tom Raines and his friends discover power dynamics have shifted at the Pentagonal Spire, where they continue their Intrasolar Forces training. New regulations are not just frustrating but dangerous as well, and what follows are more of the high-tech thrills and action that fans of the series have come to expect.

Starred Review Tom Raines is now 16, and he feels certain he has seen the worst that power-hungry individuals like Joseph Vengerov have to offer. He and his fellow cadets ri, Wyatt, and Vik ickly realize that life in the Pentagonal Spire has become almost unbearable with the rise to power of General Mezilo and his extreme disciplinary tactics. Further complicating things is the reality that Blackburn has created a neural link with Tom, and when a new "ghost in the machine" begins systematically removing all of the world's oligarchy, it is Tom alone who may be able to stop Vengerov from literally taking over the world. Kincaid's Insignia series has proven science fiction worthy of comparison with Asimov. Throughout, Tom has been a believable character, and here he is more human than ever in spite of his superhuman powers. Fast-paced and brilliantly executed, with complications and unanticipated turns, this conclusion to the Insignia trilogy is far-reaching and gut-wrenching in its chilling portrayal of an unstoppable madman using technology to control the human race. Readers will be spellbound as they inhale this last chapter. HIGH-DEMAND BACKSTORY: The demand doesn't get much higher than this for the throngs of readers who have been eagerly waiting for the trilogy's conclusion.